Telephone Line Monitor

The AI-5120 is a compact device designed for monitoring and analyzing signals present on the telephone line. By sensing the voltage present on the telephone line it detects and measures ringing, DTMF & pulse dialing, FSK (Bell 202 and V.23) signals, line polarity reversals, and open switching intervals (OSI). The supplied TRsSim PC software provides a high level graphical user interface for analyzing and debugging telephony related signals such as Caller ID and SMS (Short Message Service) data transmission. Like an oscilloscope, it can capture and display waveforms showing the various signals present on the telephone line

Features:

• Detect and decode Telecordia, ETSI, and NTT Caller ID
• Detect and decode ETSI (ES 201 912) SMS messages
• Detect and measure DTMF dialing
• Capture and view waveforms (time or frequency domain)
• Monitor signals using external BNC or speaker output
• Measure DC line voltage, AC RMS level, and frequency
• Programmable filters (low pass, high pass, band pass, notch, DTMF band split, C-message weighted)
• Detect line state events such as on-hook, off-hook, line flash, line reversal, and OSI (open switching interval)
• Export/import waveforms to/from text or wave (.wav) files
• Trigger waveform recording using digital inputs
• Monitor line status, ringing status, and FSK decoder status using digital outputs

Applications:

• Verifing Caller ID signal generation from CO's, PBX's, analog terminal adapaters, and line simulation equipment
• Testing and troubleshooting fixed line SMS delivery and submission for SME devices conforming to ETSI ES 201 912
• Measuring general telephony signals such as DTMF, ringing, line flash duration, and line voltage
• Monitor telephone line signals

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The AI-5620 simulates a single port two wire analog TE (Terminal Equipment) or CPE (Customer Premise Equipment) device. It is designed to measure and analyze signals generated by a CO (central office) line card, VoIP terminal adapter FXS port, or any device utilizing a SLIC (subscriber line interface circuit).

Features:

Measurement & Signal Detection
• Line voltage, loop current, common mode voltage
• Ringing frequency, level, duration, DC offset voltage
• AC RMS level, frequency, THD+N
• DTMF digit level, twist, frequency error, duration
• CAS/DTAS level, frequency, duration
• Metering pulse level, frequency, duration
• V.23 and Bell 202 FSK based Caller ID
• Pulse dialing, line flash, polarity reversals

Signal Generation Capabilities
• DTMF tones with arbitrary frequency, level, and duration
• V.23 and Bell 202 FSK modulated data
• One to four tones of arbitrary frequency, level, and duration
• Wavefile playback
• Broadband noise generation
• Echo generation

Line Interface Capabilities
• Off hook DC resistance from 50 to 1000 ohms
• Resistive AC impedance from 200 to 1000 ohms
• Complex AC terminations for TBR-21, German ZR
• Programmable ringing loads
• Programmable flash timing and pulse dialing

Applications:

• Verifying Caller ID signal generation from CO's, PBX's, and line simulation equipment.
• Measuring general telephony signals such as DTMF, ringing, line flash duration, and line voltage.
• Testing SLIC characteristics using adjustable load resistances, ringing loads, and AC terminations.
• Monitoring telephone line signals

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The AI-7280 is a highly flexible central office line simulator. It is designed primarily for the testing and verification of common terminal equipment, including standard telephones, Caller ID devices, SMS (Short Message Service) capable equipment, and any device using an analog Tip/Ring interface circuit.

Supplied with the TRsSim software for Windows, it can analyze a telephone's DTMF characteristics, pulse dialing and flash timing, generate various network tones and ringing patterns. Both Type I (on-hook) and Type II (off-hook) Caller ID is supported using either FSK or DTMF data transmission. As an optional component, the TRsSim software can perform SMS testing to either the ETSI protocol 1 or protocol 2 standards

Features:

• Send and receive Bell 202 or V.23 FSK for SMS testing applications
• Type I (on-hook) & Type II (off-hook) Caller ID Signal Generation (both FSK and DTMF)
• Programmable line voltage and loop current telephone interface
• Programmable line impedance and balance impedance.
• Generates network tones (up to four frequencies), DTMF, FSK, MF, and AM signals
• Generates ringing with adjustable frequency, level, dc offset voltage, phase, and wave shape
• Measure signal frequency, level, THD+N, DTMF level & frequency
• Various selectable measurement filters, including low pass, high pass, band pass, notch, C-message
• Measure DC line voltage and loop current
• Programmable noise, echo, OSI, and line reversal impairments
• External BNC connectors for audio monitoring and loop-through
• USB and RS-232 interface to PC

Applications:

• Sending and receiving ETSI SMS messages to and from protocol 1 and protocol 2 compliant telephones.
• Testing the Caller ID capability of telephony devices
• Testing telephony signaling (dialing, network tone detection)
• Integration into user developed testing systems via the supplied DLL drivers.

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The AI-80 is a fully programmable stand alone Caller ID signal generator designed for production environments. It is capable of generating signals for all FSK and DTMF based Caller ID standards. Includes general telephone signal analysis features and a highly flexible programming language for sophisticated and complex production testing sequences.

Features:

• Type I (on-hook) & Type II (off-hook) Caller ID Signal Generation
• Supports various international standards such as Telecordia (Bellcore), TIA, ETSI (European), BT, CCA, NTT (Japan)
• Generates both FSK and DTMF based Caller ID
• Single, Multiple, and Visual Message Waiting data formats
• Measure telephone dialing and signaling characteristics
• Programmable network tones (dial tone, stutter dial tone, busy, ring back)
• Rugged and compact unit for stand alone operation
• Develop custom test programs with included Windows 95, 98, NT4, 2000 based software
• Optional analog & digital I/O module
• Optional complex and external line impedances

Applications:

• Testing the Caller ID capability of telephony devices
• Testing telephony signaling (dialing, network tone detection)
• Creating small scale production ATE systems for telephony devices

Contact us for options and further information.